WhichOne › DIY store & garden › plant › fertiliser › lawn fertiliser › liquid lawn fertiliser

The best liquid lawn fertilisers in comparison

Guaranteed independent and reliable
Millions of satisfied users every year
Last updated on 18.01.2025

Filter

Sort

Brand:Reduced items only:

Best choice

Richard Jackson Flower Power Premium Lawn Magic, Covers 500m, Lawn Feed for Gardens, Greens the Grass & Strengthens the Roots (5L)

Flower Power

free shipping

9,9

Check price

Show on Amazon

show more show less

Features

PROFESSIONAL INSPIRED FORMULA Lawn Magic can be used all year round as long as the ground temperature is above 5 C. No need to buy any other specialist feeds for different seasons
FROM RICHARD JACKSON S GARDEN Contains added seaweed extract for bio-stimulant benefits and natural sugars to build disease resistance. The professional secret of green, healthy, great looking lawns
UNIQUE DOUBLE ACTION Lawn Magic does two jobs in one. It greens the grass and strengthens the roots. It s the lawn feed used and trusted for many years by the professionals

Miracle-Gro Water Soluble Lawn Food, 1 kg

Miracle-Gro

36% off

free shipping

9,8

Check price

Show on Amazon

show more show less

Features

Note- Packaging May Vary
Easy to apply using the Miracle-Gro Feeder or mixing in a watering can

Miracle-Gro EverGreen Fast Green Spray & Feed, Liquid Lawn Food, 1 Litre

free shipping

9,7

Check price

Show on Amazon

show more show less

Features

Greens lawns in 24 hours under normal growing conditions
Coverage of up to 100 m sq
Attach to a hose to feed and water the lawn at the same time

Pro-Kleen Lawn Tonic Liquid Iron Sulphate Quality Ferrous Conditioner, Fertiliser, Grass Greener, Turf Hardener | Long-Lasting for a Healthier Looking Garden | Helps Prevent Lawn Disease (5 Litres)

Pro-Kleen

6% off

free shipping

9,6

Check price

Show on Amazon

show more show less

Features

Our super concentrate liquid lawn tonic rich in sulphate of iron and extract of seaweed, this lawn tonic encourages strong, healthy grass, Grass will be greener and produce a healthy dense sward, Pro Kleen lawn tonic improves the appearance and quality of lawns. It is also highly effective in turf hardening.
Transforming your grass has never been easier. With our Lawn Tonic you can turn your dull and dying grass into strong and green grass in no time!
Our thoroughly revised, tried and tested formula even helps to prevent lawn disease with its turf hardening qualities. On the back of the bottle are easy to follow instructions. Simply mix the suggested dosage with water and apply to your lawn with a pump sprayer or a watering can and wait for results to appear. It's that easy!
Pro-Kleen Lawn Tonic is extremely easy to use! Simply mix the suggested dosage with water and using a pump sprayer or a watering can, apply it to the grass that you wish to treat
After it has applied, simply wait for the results to appear! It really is that easy

Plantworks Ltd Empathy Lawn Feed Liquid Seaweed Stimulant 1L

16% off

free shipping

9,5

Check price

Show on Amazon

show more show less

Features

EMPATHY SUP LAWN FEED SEAWEED 1L

Recommendation

GS Plant Foods Liquid Seaweed Fertiliser, OMRI Listed & Certified Organic Plant Food, Concentrate Liquid Seaweed for Gardens, Lawns & Soil Yields

GS Plant Foods

free shipping

9,5

Check price

Show on Amazon

show more show less

Features

UNBEATABLE QUALITY Experience the power of nature with our Kelp & Seaweed Fertilizer. OMRI listed for organic gardening, GS Plant Foods Liquid Seaweed Fertiliser offers a pure and natural solution for your garden's needs. Enhancing soil conditions, it promotes robust root growth and greater nutrient absorption for thriving plants. Embrace worry-free gardening as our seaweed plant food is free from harmful chemicals, nurturing your plants and preserving the environment with every application.
ORGANIC NUTRIENT BOOST Made from the finest seaweed plant Ascophyllum Nodosum, this is one of nature s miracle plant foods. Our seaweed extract improves your plant s tolerance to excessive heat, wind, drought conditions and more. It increases and stabilizes chlorophyll in plants, which results in darker green leaves and increased sugar content in plants. Investing on our seaweed feed is the best solution for revitalizing your garden, lawn and more.
EASY APPLICATION Apply liquid seaweed & kelp to improve growing conditions in all growth stages. Simply mix 2 ounces (59ml) of this liquid fertiliser concentrate into a gallon of water (3.78l) and apply. Each gallon of this mixture will then cover as much as 1,000 sq ft. Any sprayer will work, but for large areas, the hose end sprayer is easiest! This liquid seaweed feed for plants should be sprayed in the morning or late afternoon when temperatures are lower, and the leaves stoma are open.
TRUSTED & RELIABLE At GS Plant Foods, we understand that you are placing your trust in us to provide you with the highest quality organic seaweed fertiliser products available. We have 100% confidence in the quality of our products and continuously strive to deliver the best customer experience. Our products are natural, easy to use, cost efficient, sustainable, and yield consistent & amazing results in your garden, no matter what you're growing or what medium in which your plants are growing.

Premium Certified Organic Liquid Seaweed Fertilizer - Concentrated Feed for Plants, Lawns, and Vegetables - The Shropshire Seaweed Company (1L)

11% off

free shipping

9,3

Check price

Show on Amazon

show more show less

Features

WIDELY TRUSTED Adored by professionals and amateur gardeners across the country. Find out why growers on TikTok and Instagram love this product.
SUPER SIMPLE Apply as a spray or root feed, whichever is most convenient. Add little and often across the growing season.
MULTIPURPOSE Use it on absolutely everything, from lawns to vegetables, fruits to hedges, hanging baskets, trees, and houseplants.
GREAT VALUE Each litre of concentrate makes up to 500L of feed for your garden.

Westland 20400549 Safelawn Liquid 1L, Green

free shipping

9,3

Check price

Show on Amazon

show more show less

Features

Made with 100% natural ingredients, this feed contains seaweed that acts as a natural biostimulant and also has a low salt content so it is safe to use on young lawns.
Ideal for use in the summer months for fast greening results, this slow release fertiliser produces long lasting but fast acting results.
Keep in a safe, dry frost-free place away from children, pets and food.
Shake well before use.
Fill watering can or sprayer using 50ml of product per 4.5L of water to cover 5sq.m.

Dark Green Liquid Lawn Feed - High Nitrogen Lawn Fertiliser for Greener Grass & Lawn Repair - Child & Pet Friendly - 330m² 1 Litre

Garden Lawncare Guy

9,3

Check price

Show on Amazon

show more show less

Features

HIGH NITROGEN GRASS FEED - A high nitrogen lawn feed with magnesium works within days to repair or revive your lawn with the essential nutrients it needs for a quick green up and outstanding results
3 in 1 LIQUID FERTILISER - This nitrogen fertilizer for lawns helps thicken up patchy lawns, quickly repairs damaged spots and transform slow growing areas with uneven colour to healthy green grass
SAFE FOR GARDENS - Our lawn feed is designed with safety in mind and does not require hazard or toxic warning pictograms. Simply follow the instruction and it can be safely applied in gardens enjoyed by children and pets.
USE ALL YEAR - Manufactured in the UK this liquid lawn feed is a reliable product that helps promote strong grass growth while restoring colour and vitality to your tired looking lawns.

Greenforce G60105 Green Force Instant Lawn Tonic 2.5 litres

66% off

free shipping

9,2

Offer ends in:

01Day

04hours

15minutes

02seconds

Check price

Show on Amazon

show more show less

Features

Wash of hard surfaces (kerbing walls tarmac etc) risk of staining
Apply with sprayer or watering can
Contains Nitrogen Chelated Iron and Sulphur

This ranking is created through algorithmic analysis of millions of products tailored specifically to your search. We aim to find the most suitable product for you based on manufacturer information and price. The ranking reflects our opinion and should serve as a good starting point for your purchase. We would like to point out that we have not tested the products ourselves and link to selected online shops and partners from which we may receive compensation.

You might also be interested in these liquid lawn fertilisers.

Premium Lawn Feed - 500m² Autumn/Winter Liquid Bio Boost Stimulant with Seaweed & Amino Acids - For New Seed & Existing Grass | Pet & Child Safe - STRIKING LAWNS®

Non-Scorch Formula Cannot over-apply

Check price

envii SeaFeed Xtra – Organic Liquid Seaweed Fertiliser - Multipurpose Outdoor & Indoor House Plant Food - 1 Litre Makes up to 500L

Seaweed plant fertilizer promotes strong growth, increased crop yields and lush foliage

Check price

Multi-Mite 2.5L Liquid Seaweed Organic Cold Pressed Concentrate - 100% Natural - Plant Feed Fertiliser Trees Lawn Veg & House Plants Root or Foliar Feed (2.5 LITRES)

ELIXIR OF LIFE FOR ALL PLANTS IN A BOTTLE - Our Liquid Seaweed is packed full of Carbohydrates, not only do your plants use complex carbs in their structure and as food, it's also a tasty snack for a host of beneficial Microorganisms that help create the perfect ecosystem for your greenery. Supposedly MULTI MITE Liquid Seaweed Concentrate is so powerful that it may even bring plants previously thought dead back to life!

Check price

Phostrogen Organic Lawn Food, 3.5kg - Long Lasting Balanced Organic Lawn Feed - for a Thicker, Greener and More Durable Lawn - Growing Season and Autumn Feed - Lawn Nutrition - Garden Care

SOIL IMPROVEMENT This Balanced Feed Also Helps To Improve Soil Quality

free shipping

Check price

MARPHYL Organic Liquid Fertiliser - Indoor Plant Food - Nutrient rich Seaweed Liquid Fertilizer- All Purpose Liquid Fertiliser for indoor Plants, Flowers, Vegetables, Succulents, Bamboo, Hydroponics

Superior Liquid Plant Food - MARPHYL Marine Phytoplankton is ideal as an outdoor and indoor plant fertilizer. It's an excellent vegetable fertilizer, houseplant fertilizer, and garden fertilizer. It's great for your lawn, greenhouse, and hydroponics. Enjoy gorgeous, colorful blooms with this exceptional plant food. Enhance soil quality and watch your trees, shrubs, vines, grass, plants, flowers, and vegetables thrive.

Check price

PEE-FIX dog urine neutraliser grass lawn patch repair treatment

DOG URINE NEUTRALISER FOR GRASS, WHICH WORKS LIKE MAGIC to quickly repair each grass burn patch on your lawn caused by dogs urine and other pets wee. Other products such involve placing rocks or stones in the water of your pet s drinking bowl, or put additives into pet food, to change dogs pee so that it doesn t cause lawn burn patches. We think this is unfair to pets, and unnecessary. PEE-FIX works directly on your lawn and NOT on your dog

Check price

Maxicrop POPGS4TL Original Seaweed Extract Organic Plant Growth Stimulant, 2.5L Natural Seaweed Extract Fertiliser - Boosts Healthy Root Development, Organic Growing,Plant Nutrition | Concentrate

GROWTH STIMULANT A powerful natural plant growth stimulant with added seaweed extract that brings out the best in your plants

~~£ 21.52~~ free shipping

Check price

A1 Lawn Ultimate Autumn Winter Lawn Fertiliser, 10kg (280m2) - [6-5-10] Potassium Rich Feed with Nitrogen & Phosphorous - DEFRA, FERA & SASA Approved - Encourage Growth of Roots & Strong Grass

AUTUMN WINTER LAWN TREATMENT Our in season ultimate fertiliser feeds your grass with all the nutrients to keep it lush & healthy throughout the tougher colder months. We only use specific premium homogeneous granular products & is rigorously tested to guarantee the highest quality. Easy application, no mixing.

free shipping

Check price

Miracle-Gro THICK'R Lawn Seed, Fertilliser & Soil Improver Fertiliser, Brown

Recyclable packaging, contains 40 percent recycled plastic

~~£ 17.99~~ free shipping

Check price

Liquid Iron Lawn Feed

Liquid Iron Lawn Feed + Moss Killer

free shipping

Check price

Elixir Gardens High Nitrogen Liquid Fertiliser All Season For Fruit, Flowers and Lawns | Various Sizes 1-10L | Produces 625L of liquid feed | 2.5 Litre Bottle

Here at Elixir Gardens we supply to many professional growers as well as a range of garden centres, nurseries and landscaping businesses.

~~£ 12.89~~ free shipping

Check price

Miracle-Gro All Purpose Water Soluble Plant Food Tub, 2 kg, Brown

The number one selling plant food, trusted by gardeners nationwide that grows plants twice as big as unfed plants

~~£ 15.99~~ free shipping

Check price

The best liquid lawn fertilisers in comparison

Guaranteed independent and reliable

Features

Features

Features

Features

Features

Features

Features

Features

Features

Features

You might also be interested in these liquid lawn fertilisers.

Our offer